Respuesta :

complement = 90 degrees
90 - 37 = 53
53 degrees
The key word in the question is complement.  Complementary angles add to give 90°

if the unknown angle = y
then y° +  37° = 90°
  =>   ∴ y° =  90° - 3 7°
            y  =  53°

Thus the angle measures 53°